[llvm-dev] why clang compile local to global

[liuyu11@ict.ac.cn via llvm-dev]

Hello,everyone:
     I want to known how to let clang compile my local array to local variables:
     I have the code :
    int main()
{
int a[3]={1,2,3};

        int b=7;
int c=8;
int d=9;
int e=10;
int f=11;
test(b,c,d,e,f,a);
return 0;
}
 I use clang command:clang --target=mipsel -emit-llvm -S a.c -o a.ll
 The a.ll is:
@main.a = private unnamed_addr constant [3 x i32] [i32 1, i32 2, i32 3], align 4
define i32 @main() #0 {
entry:
  %retval = alloca i32, align 4
  %a = alloca [3 x i32], align 4
  %b = alloca i32, align 4
  %c = alloca i32, align 4
  %d = alloca i32, align 4
  %e = alloca i32, align 4
  %f = alloca i32, align 4
  store i32 0, i32* %retval
  %0 = bitcast [3 x i32]* %a to i8*
  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %0, i8* bitcast ([3 x i32]* @main.a to i8*), i32 12, i32 4, i1 false)
  store i32 7, i32* %b, align 4
  store i32 8, i32* %c, align 4
  store i32 9, i32* %d, align 4
  store i32 10, i32* %e, align 4
  store i32 11, i32* %f, align 4
  %1 = load i32, i32* %b, align 4
  %2 = load i32, i32* %c, align 4
  %3 = load i32, i32* %d, align 4
  %4 = load i32, i32* %e, align 4
  %5 = load i32, i32* %f, align 4
  %arraydecay = getelementptr inbounds [3 x i32], [3 x i32]* %a, i32 0, i32 0
  call void @test(i32 signext %1, i32 signext %2, i32 signext %3, i32 signext %4, i32 signext %5, i32* %arraydecay)
  ret i32 0;}
 I want to known how to compile local array a  to a local variable
Thank  you

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